I got the brand new F10 but I am kind of sick with no rear fog light in my car. I believe most of European cars are equipped rear fog lights. BMW does that, too. However, for the US market, Most of them delete rear fog light for some reasons. Even though the rear fog light is pre-installed already.

So, for the current F10 in the US, the light control panel should look like this

I did so many researches on the internet globally and finally I found this used part from UK.
Then I got it today and swapped the original one. After the easy modification, the control panel looks like this.

On the dashboard, when I turn on the rear fog light, it will show the indicator that I never see before, which is the rear fog light

And, you can definitely see the "light" on the back!

I think this is a easy modification cause it is not programming required, just plug and play! Hope this is helpful for everyone!

Thanks fhinfo the the great write-up. I'm definitely doing the mod to my F10.
I took the part number down to my local BMW dealer today. The switch runs 68 Euro before VAT, new straight from BMW. I thought the switch would be a lot more expensive. He looked it up in the computer and it's definitely the right switch. Mine should arrive Tuesday or Wednesday next week.

I'd head up a group buy, but I'm leaving to return to the US at the end of this month. I may bring a couple back with me. I haven't decided and if I do, I'll just post them in the "For Sale" at my cost.